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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtWaylandCompositor module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWAYLANDXDGSHELLINTEGRATION_H
+#define QWAYLANDXDGSHELLINTEGRATION_H
+
+#include <QtWaylandCompositor/private/qwaylandquickshellsurfaceitem_p.h>
+#include <QtWaylandCompositor/QWaylandQuickShellSurfaceItem>
+#include <QtWaylandCompositor/QWaylandXdgToplevel>
+
+QT_BEGIN_NAMESPACE
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+class QWaylandXdgSurface;
+
+namespace QtWayland {
+
+class XdgToplevelIntegration : public QWaylandQuickShellIntegration
+{
+    Q_OBJECT
+public:
+    XdgToplevelIntegration(QWaylandQuickShellSurfaceItem *item);
+    bool mouseMoveEvent(QMouseEvent *event) override;
+    bool mouseReleaseEvent(QMouseEvent *event) override;
+
+private Q_SLOTS:
+    void handleStartMove(QWaylandSeat *seat);
+    void handleStartResize(QWaylandSeat *seat, Qt::Edges edges);
+    void handleSetMaximized();
+    void handleUnsetMaximized();
+    void handleMaximizedChanged();
+    void handleSetFullscreen();
+    void handleUnsetFullscreen();
+    void handleFullscreenChanged();
+    void handleActivatedChanged();
+    void handleSurfaceSizeChanged();
+    void handleToplevelDestroyed();
+    void handleMaximizedSizeChanged();
+    void handleFullscreenSizeChanged();
+
+private:
+    QWaylandQuickShellSurfaceItem *m_item = nullptr;
+    QWaylandXdgSurface *m_xdgSurface = nullptr;
+    QWaylandXdgToplevel *m_toplevel = nullptr;
+
+    enum class GrabberState {
+        Default,
+        Resize,
+        Move
+    };
+    GrabberState grabberState;
+
+    struct {
+        QWaylandSeat *seat = nullptr;
+        QPointF initialOffset;
+        bool initialized;
+    } moveState;
+
+    struct {
+        QWaylandSeat *seat = nullptr;
+        Qt::Edges resizeEdges;
+        QSizeF initialWindowSize;
+        QPointF initialMousePos;
+        QPointF initialPosition;
+        QSize initialSurfaceSize;
+        bool initialized;
+    } resizeState;
+
+    struct {
+        QSize initialWindowSize;
+        QPointF initialPosition;
+    } windowedGeometry;
+
+    struct {
+        QWaylandOutput *output = nullptr;
+        QMetaObject::Connection sizeChangedConnection; // Depending on whether maximized or fullscreen,
+                                                       // will be hooked to geometry-changed or available-
+                                                       // geometry-changed.
+    } nonwindowedState;
+};
+
+class XdgPopupIntegration : public QWaylandQuickShellIntegration
+{
+    Q_OBJECT
+public:
+    XdgPopupIntegration(QWaylandQuickShellSurfaceItem *item);
+
+private Q_SLOTS:
+    void handleGeometryChanged();
+
+private:
+    QWaylandQuickShellSurfaceItem *m_item = nullptr;
+    QWaylandXdgSurface *m_xdgSurface = nullptr;
+    QWaylandXdgPopup *m_popup = nullptr;
+};
+
+}
+
+QT_END_NAMESPACE
+
+#endif // QWAYLANDXDGSHELLINTEGRATION_H